<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
</head>
<body>
    <script>
                // 输入5门成绩，求总分，平均分、最高分，最低分
                var arr = new Array(83,75,65,59.5,92);
        var sum = 0;
        var max = 0;
        var min = 100;
        for(var i=0;i<arr.length;i++){
         sum += arr[i];
            if(arr[i]>max){
                max = arr[i];
            }
            if(arr[i]<min){
                min = arr[i];
            }
            console.log(sum)
        }
        document.write('5门成绩分别是：'+arr+'<br/>')
        document.write('总分是：'+ sum +'<br/>');
        document.write('平均分：'+(sum / i)+'<br/>');
        document.write('最高分：'+max+'<br/>');
        document.write('最低分：'+min);
    </script>
</body>
</html>